The Northern pikeminnow, Columbia River dace or formerly Squawfish (''Ptychocheilus oregonensis'') is a large member of the

minnow Minnow is the common name for a number of species of small freshwater fish, belonging to several genera of the families Cyprinidae and Leuciscidae. They are also known in Ireland as pinkeens. Smaller fish in the subfamily Leusciscidae are c ...

family,

Leuciscidae Leuciscinae is a subfamily of the freshwater fish family Cyprinidae, which contains the true minnows. Members of the Old World (OW) clade of minnows within this subfamily are known as European minnows. As the name suggests, most members of the O ...

. This predatory freshwater fish is native to northwestern North America, ranging from the

Nass River The Nass River is a river in northern British Columbia, Canada. It flows from the Coast Mountains southwest to Nass Bay, a sidewater of Portland Inlet, which connects to the North Pacific Ocean via the Dixon Entrance. Nass Bay joins Portland In ...

basin to the Columbia River basin. A good deal of concern has been expressed regarding the impact northern pikeminnow populations may have on salmon in Columbia and Snake river impoundments.Blecha, Peter. 2018. "Pikeminnow reward program remains strong". ''The Columbian''. https://www.columbian.com/news/2018/jul/25/pikeminnow-reward-program-remains-strong/. Accessed 8/21/18

Naming

Until 1999, when the American Fisheries Society officially changed the common name to pikeminnow, the four species of this genus ''

Ptychocheilus Pikeminnows, formerly squawfish, are cyprinid fish of the genus ''Ptychocheilus'' consisting of four species native to western North America. Voracious predators, they are considered an "undesirable" species in many waters, largely due to the spe ...

'' were known as squawfish.

Behavior and habitat

Northern pikeminnows can live at least 11 years, reaching up to in

total length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

and in weight. Female northern pikeminnow reach sexual maturity at about six years, males in three to five. A mature female can lay 30,000 eggs annually. Pikeminnow are adept predators, and in the Columbia and Snake Rivers,

salmon Salmon () is the common name for several commercially important species of euryhaline ray-finned fish from the family Salmonidae, which are native to tributaries of the North Atlantic (genus ''Salmo'') and North Pacific (genus '' Oncorhy ...

smolts comprise a large part of their diets. Their populations have flourished with the development of the Columbia River hydropower system. The reservoirs have provided excellent habitat for pikeminnow and given them an advantage over depressed salmon and

steelhead Steelhead, or occasionally steelhead trout, is the common name of the anadromous form of the coastal rainbow trout or redband trout (O. m. gairdneri). Steelhead are native to cold-water tributaries of the Pacific basin in Northeast Asia and ...

populations. Data has been collected to suggest they can eat up to 650,000 salmon fry annually. The northern pikeminnow has been shown to consume terrestrial insects, benthic invertebrates, other fish, aquatic insects, and plant matter.

Relationship with people

Northern Pikeminnow Sport Reward Program

While historically northern pikeminnow have not been of interest commercially nor to sport anglers, Washington and Oregon state fisheries agencies and the

Bonneville Power Administration The Bonneville Power Administration (BPA) is an American federal agency operating in the Pacific Northwest. BPA was created by an act of Congress in 1937 to market electric power from the Bonneville Dam located on the Columbia River and to cons ...

have placed a

bounty Bounty or bounties commonly refers to: * Bounty (reward), an amount of money or other reward offered by an organization for a specific task done with a person or thing Bounty or bounties may also refer to: Geography * Bounty, Saskatchewan, a g ...

on them to reduce predation on scarce salmon stocks. A commercial fishery has developed based on that bounty. The current

International Game Fish Association The International Game Fish Association (''IGFA'') is the leading authority on angling pursuits and the keeper of the most current World Record fishing catches by fish categories. Fishermen who are sport fishers are careful to follow their string ...

all tackle world record for northern pikeminnow is from the Snake River near Almota, Washington.

References

{{DEFAULTSORT:Northern pikeminnow Ptychocheilus Fish described in 1836